Making the registry global allows compilers to optimize away those Symbol.for() ... | Hacker News

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pavlov on June 12, 2015 | parent | context | favorite | on: ES6 in Depth – Symbols

Making the registry global allows compilers to optimize away those Symbol.for() calls, since they know that each call to Symbol.for("cat") is going to resolve to the same symbol instance.

agd on June 12, 2015 [–]

But if people are concerned about performance, they can just pre-allocate/memoize the symbols.

It doesn't seem like the registry adds any new functionality, and it might encourage use of globals. Surely that's a bad thing?

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